Resonantly enhanced frequency doubling of a continuous-wave ytterbium-doped fiber laser

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F19%3A00367149" target="_blank" >RIV/68407700:21340/19:00367149 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.17973/MMSJ.2019_12_2019108" target="_blank" >https://doi.org/10.17973/MMSJ.2019_12_2019108</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17973/MMSJ.2019_12_2019108" target="_blank" >10.17973/MMSJ.2019_12_2019108</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Resonantly enhanced frequency doubling of a continuous-wave ytterbium-doped fiber laser

Popis výsledku v původním jazyce

A single-mode ytterbium-doped continuous-wave fiber laser operated at a wavelength of 1030 nm is designed and utilized for frequency doubling at 515 nm in a periodically poled lithium niobate (PPLN) crystal. The standard single-pass of the PPLN results in a conversion efficiency of only 2 % due to the low intensity of the continuous-wave laser even though optimal focusing into the PPLN is used. Because the second harmonic (SH) power depends quadratically on the input power, the intensity of the 1030 nm beam needs to be increased. Therefore, the beam enters an external resonant enhancement cavity with a high quality factor. The waves are trapped inside the resonant cavity and superimposed resulting in an increase of intracavity power by an estimated factor of 24. SH conversion efficiency of over 51 % is achieved after placing the PPLN inside the enhancement cavity. This is more than 25 times higher than for the single-pass case showing high potential of this method which is easily scalable to watt-level powers. 515 nm beams with wattlevel power can be used e.g. to pump titanium sapphire lasers, which generate femtosecond laser pulses that can be used for precise micromachining.

Název v anglickém jazyce

Resonantly enhanced frequency doubling of a continuous-wave ytterbium-doped fiber laser

Popis výsledku anglicky

A single-mode ytterbium-doped continuous-wave fiber laser operated at a wavelength of 1030 nm is designed and utilized for frequency doubling at 515 nm in a periodically poled lithium niobate (PPLN) crystal. The standard single-pass of the PPLN results in a conversion efficiency of only 2 % due to the low intensity of the continuous-wave laser even though optimal focusing into the PPLN is used. Because the second harmonic (SH) power depends quadratically on the input power, the intensity of the 1030 nm beam needs to be increased. Therefore, the beam enters an external resonant enhancement cavity with a high quality factor. The waves are trapped inside the resonant cavity and superimposed resulting in an increase of intracavity power by an estimated factor of 24. SH conversion efficiency of over 51 % is achieved after placing the PPLN inside the enhancement cavity. This is more than 25 times higher than for the single-pass case showing high potential of this method which is easily scalable to watt-level powers. 515 nm beams with wattlevel power can be used e.g. to pump titanium sapphire lasers, which generate femtosecond laser pulses that can be used for precise micromachining.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

MM Science Journal

ISSN

1803-1269

e-ISSN

1805-0476

Svazek periodika

2019

Číslo periodika v rámci svazku

Dec

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

4

Strana od-do

3607-3610

Kód UT WoS článku

000532572200034

EID výsledku v databázi Scopus

2-s2.0-85076610905